Edit: Here is the list, why it’s not stickied I don’t know:
Free Character Transfers for Burning Crusade Classic Realms - WoW Classic / Burning Crusade Classic Discussion - World of Warcraft Forums (blizzard.com)
Sulfuras isn’t on the list yet because there are currently still a lot of horde there. Not surprisingly the person posting paid absolutely no attention to realm you said or where the free transfers are allowed from, because they are a bad person and a forum troll, the exact type of low life that my post right before theirs described, and their only goal was to be nasty to you. So paying attention is not their strong suit.
Again, just wait at least for a 30% off sale. These sale happen a lot. These are your alts and something may change.
i have an alt I’ve been considering transferring as well. I’m waiting.